Supermetallic conductivity in bromine-intercalated graphite
- 16 March 2010
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 81 (11), 115428
- https://doi.org/10.1103/physrevb.81.115428
Abstract
Exposure of highly oriented pyrolytic graphite to bromine vapor gives rise to in-plane charge conductivities which increase monotonically with intercalation time toward values (for Br) that are significantly higher than Cu at temperatures down to 5 K. Magnetotransport, optical reflectivity and magnetic susceptibility measurements confirm that the Br dopes the graphene sheets with holes while simultaneously increasing the interplanar separation. The high-room-temperature mobility and resistance anisotropy together with the reduced diamagnetic susceptibility of the intercalated samples suggests that the observed supermetallic conductivity derives from a parallel combination of weakly coupled hole-doped graphene sheets.
Keywords
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